Submission #1215034

#	Time	Username	Problem	Language	Result	Execution time	Memory
1215034		thunopro	Hack (APIO25_hack)	C++20	Compilation error	0 ms	0 KiB

hack

#include<bits/stdc++.h>
using namespace std ;
#define ll long long 
#include "hack.h" 

const int N = 1e6 ; 
ll calc ( int mid ) 
{
	ll total = 0 ; 
	for ( int i = 1 ; i <= mid ; i ++ ) 
	{
		int x ; 
		if ( N % mid == 0 ) x = N / mid ; 
		else x = N / mid + ( N % mid <= i ) ; 
		total += 1ll*x*(x-1)/2 ; 
	}	
	return total ; 
}

int hack () 
{
	vector<ll> v ; 
	for ( int i = 1 ; i <= N ; i ++ ) v . pb (i) ; 
	ll result = collisions ( v ) ; 
	int l = 1 , r = 1e6 ; 
	int res = 0 ; 
	while ( l <= r ) 
	{
		int mid = (l+r)/2 ; 
		if ( calc (mid) >= result ) l = mid + 1 , res = mid ; 
		else r = mid - 1 ; 
	}
	return res ; 
}

Compilation message (stderr)

hack.cpp: In function 'int hack()':
hack.cpp:23:47: error: 'class std::vector<long long int>' has no member named 'pb'
   23 |         for ( int i = 1 ; i <= N ; i ++ ) v . pb (i) ;
      |                                               ^~